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There is a win of the day bonus that gives you an extra boost 22 hours from your last win of the day.

Quote:

"Why did I earn __ XP/IP for this normal game?"
-Base win XP/IP is ~100/100, base loss XP/IP is 70/70.
-Wins gain up to ~16 extra IP from quicker games, losses up to ~11 from longer ones.
-A string of games without a leaver mark will build up to a ~23 IP bonus for wins, and a ~11 IP bonus for losses.
-A XP or IP boost doubles the respective above rewards for its duration.
-On your first win of the day you will earn a bonus ~150 XP/IP. There is a 22 hour timer after the end of your last FWotD before you are eligible to earn another.
-If a game is over in 10 minutes or less it counts as a draw. Neither team receives XP/IP, nor a win, loss, or leaver mark. This is to prevent abuse.
-Practice games function slightly differently; please see below.

1. Whether u won or not (base IP of 70 something for a win, 50 for a loss)
2. How long the game lasted, if you won quickly you get a bonus, if you lost, but dragged it out you get a bonus
3. A streak of games without leaving (caps at about 23)
4. 1st win every 22 hours gives you +158 IP (1st win of the day bonus)

IP is not based on KDA at all

also the fastest way to get IP would be to buy an IP boost and play lots of games